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Finding the Fourth Proportional to 666,623.16, 920,059.70 and 376,323.21

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Solution

The fourth proportional to 666,623.16, 920,059.70 and 376,323.21 is: 519,393.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,623.16 : 920,059.70 = 376,323.21 : x
  2. Step 2: Convert to fraction form
    666,623.16/920,059.70 = 376,323.21/x
  3. Step 3: Cross multiply
    666,623.16x = 920,059.70 × 376,323.21
  4. Step 4: Simplify right side
    666,623.16x = 346,239,817,814.02
  5. Step 5: Solve for x
    x = 346,239,817,814.02/666,623.16
  6. Step 6: Final answer
    x = 519,393.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.